cadd scores in variant table
load vcf for cadd unit test
add vcf for cadd unit test
annotation provenance for CADD scores
add option to skip CADD loading
add CADD scores to variant table; add new indices, remove duplicates
add unit test for CADD
run unit test for CADD
add CADD data file for install
load cadd scores by default in variants table
load cadd
get cadd scores for variants